Non-metallic spin-on filter

摘要

A plastic oil filter (10) comprises a cup-shaped shell (12) with an open end (14). The shell contains an annular filter media (36). A backplate (40) is positioned in the open end of the shell. An elongated core (38) is positioned in the opening in the filter media. The core is hollow and has a plurality of openings (62) in the walls thereof. Sealing washers (69, 70) are provided at each end of the filter media for preventing undesired flow between the core and the ID of the respective sealing washers.